Locomotive



(No Model.)

- O. A. COUCH.

LOCOMOTIVE- N0. 528,078. Patented Oct. 23, 1894.

UNITED STATES PATENT @rmcn.

CHARLES ALBERT COUCH, OF COLUMBUS, OHIO, ASSIGNOR TOEVELINE N.

TANNER, OF MONSON, MASSACHUSETTS.

LOCOMOTIVE.

SPECIFICATION forming part of Letters Patent 0. 528,078, dated October23, 1894. Application filed January 15,1894. Serial No. 496,961. (Nomodel.)

To all whom it may concern:

Be it known that 1, CHARLES ALBERT OoUon, a citizen of the UnitedStates, residing at O0- lumbus, in the county of Franklin and State ofOhio, have invented a new and useful Improvement in Locomotives, ofwhich the following is a specification.

My invention relates to improvements in locomotives preferably in whichthe exhaust steam passes through the exhaust flue or pipe, upwardthrough the smoke stack to aid the draft, and the objects of myimprovement are: first, by interposing a heat deflector to the line ofdraft in the smoke stacks of a locomotive to deflect the heat before itpasses upward through the smoke stack and cause it to circulate withinthe said smoke box, and tubes, rather than escape through the smokestack; second, to prevent in a great measure the down draft of cold airinto the smoke box and boiler tubes, and the disturbance of fire in thefire box, and consequent loss of fuel, and, third, to sage such air assucceeds in forcing itself downward toward the smoke box. I attain theseobjects by the mechanism illustrated in the accompanying drawings, inwhich- Figure 1. is a side view of the forward part of a locomotiveboiler, with the smoke box and smoke stack partly broken away to show mydeflector in position. Fig. 2. is a front view of the same, with thefront of the smoke box removed and stack Fig. 3, a detailed View showingdeflector.

Similar letters refer to similar parts throughout the several views.

0 is the casing of the boiler, and b, boiler tubes; at, the smoke stack,and d, the exhaust flue, supported in place in the smoke box in linewith the smoke stack in the usual way, as shown in Figs. 2 and 3.

Attached to the upper end of the exhaust flue or pipe, cl, is the heatdeflector, e, of shape shown, being that of an inverted, truncated cone,and made preferably of metal of sufficient thickness to retainconsiderable heat. The upper edge of the deflector is located on a linesufficiently below the lower opening of the smoke stack to leave apassage-way, g g, of the same or rather, greater capacity than that ofthe smoke stack. The

heat in its pas partly broken away,

diameter of the upper edge of the deflector is greater than the loweropening of the smoke stack, in practice preferably about three inches sothat the downward draft of. 5 5 cold air is intercepted by the interiorof the heat deflector.

The heat deflector, e, may be an integral part of the exhaust flue, d,as shown in Fig. l, orit may be detachable, as shown in Figs. 2 and 3.In practice it has been ascertained that after each upward blast of theexhaust, a partial vacuum is formed in the smoke box, causing a downwardrush of airthrough the smoke stack into the smoke box, and thencethrough the fines of the boiler, cooling the same and causing adisturbance of the bed of coals in the fire box, whereby 'much of thefuel is loosened, and the finer particles of the same escape beforecombustion takes place,

through .the flues of the boiler and smoke box and are thence lostthrough the smoke stack.

The mode of operation of my invention is as follows: After the heatedair and gaseous products of combustion pass through the boiler tubes, d,into the smoke box, they impinge upon the outside curved surface of theheat deflector, e, and are deflected from their course toward the smokestack and caused to circulate within the smoke box and around the saiddeflector, thereby heating it until they pass upward through thepassage, g g, into the smoke stack, and thence to the open air. The colddraft of air downward through 8 5 the smoke stack is prevented bystriking the heated interior surface of the deflector, where it becomesheated, and if any escapes downward into the smoke box and boiler tubes,it is ata sufficiently high temperature not to chill the tubes.Furthermore, as the down draft is nearly abolished, the upward draftthrough the boiler tubes is nearly uniform so that the fire in the firebox is not disturbed, thereby preventing the esc pe of the smallerparticles 9 5 of fuel.

What I claim as new,and desire to secure by Letters Patent, is-- 1. In alocomotive, a hollow heat deflector located at the top of the exhaustflue, (d,)

having its sides inclined inwardly and downwardly, interposed andsupported between the boiler tube and the smoke stack, substanshapedheatdeflector, e, located at the top of tially as described. the saidexhaust flue (d), and interposed and 2. In alocomotive in combinationwith the supported between the boiler tubes and the exhaust flue, d, thehollow, inverted conical smoke stack havingits upperdiameter greater 155 shaped heat deflector, 6, located at the top than the lower diameterof the smoke stack,

of the said exhaust flue (d), interposed and substantially as described.supported between the boiler tubes, and the Montreal, November 27, 1893.

smoke stack, substantially as described and CHARLES ALBERT COUCH. forthe purposes set forth. In presence of- 1o 3. In a locomotive incombination with the FRED. J. SEARS,

exhaust flue, d, the hollow, inverted, conical R. A. O. KIMBLE.

